Load Specifications
Load data in caliber .300 Win. Mag. with .308 | 220gr | Rhino Solid Shank bullet and 77 powders. The key underlying parameters are shown in the table above. The recommended powders for this cartridge and bullet combination are Vihtavuori N560, Accurate MAGPRO and Alliant Reloder-26.
Important Notice: DO NOT go below Minimum Charge or above Maximum Charge. Since we have no control over the equipment and components used, any responsibility and liability for the results achieved is rejected.
Only powders/loads that match the current filter criteria are displayed: max pressure of a load ≤ 90% of max. standardized pressure, fill rate ≥ 80% and propellant combustion ≥ 95%. Use the sliders above the tables to adjust these thresholds.
Charge: Powder weight in grains. Start with the minimum load and work up carefully.
FR (Fill Rate): Case fill as a percentage. Values above 100% mean compressed loads.
MaxP / %: Maximum chamber pressure in bar and as a percentage of the standardized maximum for this caliber.
V(0): Muzzle velocity in feet per second (fps) at the standardized barrel length.
z (Powder Burn): Estimated propellant combustion percentage at bullet exit.
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You can find more information in our FAQ: How can I use the Personalized Load Calculator?
Max Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 96% | 55,201 psi | 89% | 2592 fps | 100% |
| Accurate 4350 | <<locked>> | 86% | 53,301 psi | 85% | 2572 fps | 100% |
| Accurate MAGPRO | <<locked>> | 94% | 53,693 psi | 86% | 2680 fps | 98% |
| ADI AR 2208 | <<locked>> | 82% | 54,955 psi | 88% | 2533 fps | 100% |
| ADI AR 2209 | <<locked>> | 92% | 54,114 psi | 87% | 2625 fps | 99.5% |
| ADI AR 2213 | <<locked>> | 96% | 55,114 psi | 88% | 2677 fps | 99% |
| ADI AR 2217ᴾ | <<locked>> | 100% | 46,253 psi | 74% | 2533 fps | 97.7% |
| ADI AR 2225ᴾ | <<locked>> | 100% | 40,930 psi | 66% | 2497 fps | 99.2% |
| Alliant Reloder- TS 15.5 | <<locked>> | 82% | 56,289 psi | 90% | 2556 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 88% | 54,215 psi | 87% | 2621 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 84% | 55,303 psi | 89% | 2635 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 92% | 53,534 psi | 86% | 2615 fps | 99.5% |
| Alliant Reloder-22 | <<locked>> | 96% | 54,853 psi | 88% | 2674 fps | 99.7% |
| Alliant Reloder-23 | <<locked>> | 98% | 55,898 psi | 90% | 2644 fps | 100% |
| Alliant Reloder-25ᴾ | <<locked>> | 100% | 51,474 psi | 83% | 2651 fps | 100% |
| Alliant Reloder-26 | <<locked>> | 94% | 56,173 psi | 90% | 2730 fps | 100% |
| Baschieri & Pellagri 109 | <<locked>> | 96% | 53,911 psi | 86% | 2592 fps | 96.1% |
| Bofors RP15 | <<locked>> | 98% | 54,041 psi | 87% | 2661 fps | 99.5% |
| Bofors RP30ᴾ | <<locked>> | 100% | 47,514 psi | 76% | 2595 fps | 98.4% |
| Bofors RP5 | <<locked>> | 96% | 54,853 psi | 88% | 2674 fps | 99.7% |
| Bofors RP7 | <<locked>> | 86% | 56,202 psi | 90% | 2572 fps | 99.9% |
| Hodgdon H1000ᴾ | <<locked>> | 100% | 50,792 psi | 81% | 2612 fps | 99% |
| Hodgdon H414 | <<locked>> | 86% | 55,143 psi | 88% | 2621 fps | 100% |
| Hodgdon H4350 | <<locked>> | 84% | 54,331 psi | 87% | 2579 fps | 99.6% |
| Hodgdon H4831 | <<locked>> | 94% | 55,405 psi | 89% | 2625 fps | 98.5% |
| Hodgdon H4831 SC | <<locked>> | 94% | 54,128 psi | 87% | 2608 fps | 98.3% |
| Hodgdon Hybrid 100V | <<locked>> | 90% | 54,621 psi | 88% | 2552 fps | 100% |
| Hodgdon Retumboᴾ | <<locked>> | 100% | 50,589 psi | 81% | 2713 fps | 99.8% |
| Hodgdon Superformance | <<locked>> | 86% | 55,390 psi | 89% | 2661 fps | 100% |
| Hodgdon TrailBossᴾ | <<locked>> | 100% | 37,014 psi | 59% | 1588 fps | 100% |
| IMR 4350 | <<locked>> | 88% | 54,143 psi | 87% | 2562 fps | 99.8% |
| IMR 4451 Enduron | <<locked>> | 84% | 54,244 psi | 87% | 2546 fps | 99.9% |
| IMR 4831 | <<locked>> | 88% | 53,751 psi | 86% | 2566 fps | 100% |
| IMR 4955 Enduron | <<locked>> | 92% | 53,258 psi | 85% | 2559 fps | 98.3% |
| IMR 7828 SSC | <<locked>> | 96% | 52,968 psi | 85% | 2657 fps | 98.8% |
| Lovex S065 | <<locked>> | 86% | 54,723 psi | 88% | 2543 fps | 100% |
| Lovex S070 | <<locked>> | 88% | 56,101 psi | 90% | 2585 fps | 100% |
| Lovex S071ᴾ | <<locked>> | 100% | 52,591 psi | 84% | 2556 fps | 100% |
| Norma 204 | <<locked>> | 88% | 54,737 psi | 88% | 2612 fps | 99.4% |
| Norma 217ᴾ | <<locked>> | 100% | 36,405 psi | 58% | 2428 fps | 97.5% |
| Norma MRP | <<locked>> | 94% | 54,752 psi | 88% | 2697 fps | 100% |
| Norma URP | <<locked>> | 88% | 55,347 psi | 89% | 2602 fps | 100% |
| Ramshot Grand | <<locked>> | 96% | 53,272 psi | 85% | 2674 fps | 99.1% |
| Ramshot Hunter | <<locked>> | 88% | 54,157 psi | 87% | 2612 fps | 100% |
| Ramshot Magnumᴾ | <<locked>> | 100% | 55,390 psi | 89% | 2671 fps | 99.9% |
| ReloadSwiss RS 14ᴾ | <<locked>> | 100% | 37,710 psi | 60% | 1624 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 82% | 54,679 psi | 88% | 2621 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 86% | 53,200 psi | 85% | 2595 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 88% | 54,984 psi | 88% | 2671 fps | 100% |
| ReloadSwiss RS 76ᴾ | <<locked>> | 100% | 50,662 psi | 81% | 2710 fps | 100% |
| ReloadSwiss RS 80ᴾ | <<locked>> | 100% | 45,585 psi | 73% | 2598 fps | 96.5% |
| Rottweil R 903 | <<locked>> | 82% | 53,983 psi | 87% | 2523 fps | 100% |
| Rottweil R 904 | <<locked>> | 92% | 55,448 psi | 89% | 2595 fps | 99% |
| Rottweil R 905 | <<locked>> | 92% | 52,968 psi | 85% | 2602 fps | 99.5% |
| Rottweil R 907 | <<locked>> | 86% | 56,202 psi | 90% | 2572 fps | 99.9% |
| Shooters World Long Rifle | <<locked>> | 86% | 54,723 psi | 88% | 2543 fps | 100% |
| Shooters World SW4350 | <<locked>> | 88% | 56,101 psi | 90% | 2585 fps | 100% |
| SNPE Vectan SP 11 | <<locked>> | 82% | 55,288 psi | 89% | 2579 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 82% | 54,186 psi | 87% | 2408 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 86% | 53,882 psi | 86% | 2500 fps | 99.9% |
| SNPE Vectan Tubal 8000 | <<locked>> | 94% | 56,086 psi | 90% | 2651 fps | 99.7% |
| Somchem S355 | <<locked>> | 82% | 53,809 psi | 86% | 2520 fps | 100% |
| Somchem S361 | <<locked>> | 90% | 53,258 psi | 85% | 2539 fps | 98.1% |
| Somchem S365 | <<locked>> | 90% | 55,637 psi | 89% | 2605 fps | 100% |
| Somchem S385 | <<locked>> | 92% | 53,519 psi | 86% | 2579 fps | 99.8% |
| Vihtavuori N150 | <<locked>> | 84% | 54,882 psi | 88% | 2493 fps | 100% |
| Vihtavuori N160 | <<locked>> | 86% | 53,780 psi | 86% | 2549 fps | 100% |
| Vihtavuori N165 | <<locked>> | 98% | 56,420 psi | 90% | 2608 fps | 99.8% |
| Vihtavuori N550 | <<locked>> | 88% | 56,304 psi | 90% | 2602 fps | 100% |
| Vihtavuori N555 | <<locked>> | 94% | 54,824 psi | 88% | 2621 fps | 100% |
| Vihtavuori N560 | <<locked>> | 94% | 54,723 psi | 88% | 2694 fps | 98.7% |
| Vihtavuori N565ᴾ | <<locked>> | 100% | 54,027 psi | 87% | 2671 fps | 98.7% |
| Vihtavuori N568ᴾ | <<locked>> | 100% | 47,065 psi | 75% | 2608 fps | 96.3% |
| Winchester 6.5 StaBALL | <<locked>> | 86% | 53,055 psi | 85% | 2516 fps | 100% |
| Winchester 760 | <<locked>> | 86% | 55,143 psi | 88% | 2621 fps | 100% |
| Winchester StaBALL HD | <<locked>> | 98% | 52,605 psi | 84% | 2720 fps | 100% |
| Winchester Supreme 780 | <<locked>> | 94% | 53,243 psi | 85% | 2575 fps | 99.4% |
Recommended = one of the top powders for this cartridge and bullet combination.
Start Load - Barrel Length: 24"
| Powder | Charge | FR | MaxP | % | V(0) | z |
|---|---|---|---|---|---|---|
| Accurate 3100 | <<locked>> | 80% | 32,387 psi | 52% | 2198 fps | 97.3% |
| Accurate 4350 | <<locked>> | 80% | 43,555 psi | 70% | 2425 fps | 100% |
| Accurate MAGPRO | 65.5 gr | 88% | 43,482 psi | 70% | 2510 fps | 95.7% |
| ADI AR 2208 | <<locked>> | 80% | 51,837 psi | 83% | 2487 fps | 100% |
| ADI AR 2209 | <<locked>> | 80% | 36,492 psi | 59% | 2313 fps | 95.9% |
| ADI AR 2213 | <<locked>> | 86% | 39,711 psi | 64% | 2408 fps | 95.5% |
| ADI AR 2217 | <<locked>> | 94% | 37,971 psi | 61% | 2369 fps | 95.1% |
| ADI AR 2225 | <<locked>> | 92% | 31,879 psi | 51% | 2283 fps | 96% |
| Alliant Reloder- TS 15.5 | <<locked>> | 80% | 52,852 psi | 85% | 2510 fps | 100% |
| Alliant Reloder-16 | <<locked>> | 80% | 41,785 psi | 67% | 2428 fps | 100% |
| Alliant Reloder-17 | <<locked>> | 80% | 47,921 psi | 77% | 2533 fps | 100% |
| Alliant Reloder-19 | <<locked>> | 80% | 36,463 psi | 58% | 2310 fps | 96% |
| Alliant Reloder-22 | <<locked>> | 82% | 34,461 psi | 55% | 2306 fps | 95.4% |
| Alliant Reloder-23 | <<locked>> | 80% | 31,140 psi | 50% | 2228 fps | 99.6% |
| Alliant Reloder-25 | <<locked>> | 80% | 27,224 psi | 44% | 2142 fps | 95.6% |
| Alliant Reloder-26 | 60.2 gr | 80% | 33,591 psi | 54% | 2346 fps | 99% |
| Baschieri & Pellagri 109 | <<locked>> | 94% | 50,691 psi | 81% | 2543 fps | 95.3% |
| Bofors RP15 | <<locked>> | 84% | 34,374 psi | 55% | 2303 fps | 95.2% |
| Bofors RP30 | <<locked>> | 92% | 36,419 psi | 58% | 2382 fps | 95.3% |
| Bofors RP5 | <<locked>> | 82% | 34,461 psi | 55% | 2306 fps | 95.4% |
| Bofors RP7 | <<locked>> | 80% | 46,717 psi | 75% | 2428 fps | 99.2% |
| Hodgdon H1000 | <<locked>> | 90% | 36,318 psi | 58% | 2336 fps | 95.1% |
| Hodgdon H414 | <<locked>> | 80% | 45,324 psi | 73% | 2470 fps | 99.4% |
| Hodgdon H4350 | <<locked>> | 80% | 47,892 psi | 77% | 2480 fps | 98.9% |
| Hodgdon H4831 | <<locked>> | 86% | 42,395 psi | 68% | 2411 fps | 95.7% |
| Hodgdon H4831 SC | <<locked>> | 86% | 41,626 psi | 67% | 2398 fps | 95.5% |
| Hodgdon Hybrid 100V | <<locked>> | 80% | 39,523 psi | 63% | 2326 fps | 100% |
| Hodgdon Retumbo | <<locked>> | 88% | 34,214 psi | 55% | 2372 fps | 95.8% |
| Hodgdon Superformance | <<locked>> | 80% | 44,411 psi | 71% | 2490 fps | 99.1% |
| Hodgdon TrailBoss | <<locked>> | 80% | 27,775 psi | 45% | 1417 fps | 100% |
| IMR 4350 | <<locked>> | 80% | 42,163 psi | 68% | 2369 fps | 98.5% |
| IMR 4451 Enduron | <<locked>> | 80% | 47,921 psi | 77% | 2448 fps | 99.5% |
| IMR 4831 | <<locked>> | 80% | 41,510 psi | 67% | 2375 fps | 99.9% |
| IMR 4955 Enduron | <<locked>> | 84% | 41,524 psi | 67% | 2359 fps | 95.7% |
| IMR 7828 SSC | <<locked>> | 86% | 38,087 psi | 61% | 2385 fps | 95.1% |
| Lovex S065 | <<locked>> | 80% | 45,600 psi | 73% | 2405 fps | 99.8% |
| Lovex S070 | <<locked>> | 80% | 43,888 psi | 70% | 2398 fps | 99.2% |
| Lovex S071 | <<locked>> | 80% | 28,007 psi | 45% | 2093 fps | 95.5% |
| Norma 204 | <<locked>> | 80% | 41,858 psi | 67% | 2398 fps | 97.4% |
| Norma 217 | <<locked>> | 96% | 32,097 psi | 51% | 2323 fps | 95.6% |
| Norma MRP | <<locked>> | 80% | 33,576 psi | 54% | 2313 fps | 96.6% |
| Norma URP | <<locked>> | 80% | 42,902 psi | 69% | 2415 fps | 100% |
| Ramshot Grand | <<locked>> | 86% | 37,565 psi | 60% | 2388 fps | 95.3% |
| Ramshot Hunter | <<locked>> | 80% | 41,611 psi | 67% | 2411 fps | 99.3% |
| Ramshot Magnum | <<locked>> | 86% | 33,315 psi | 53% | 2280 fps | 95.7% |
| ReloadSwiss RS 14 | <<locked>> | 80% | 28,268 psi | 45% | 1450 fps | 100% |
| ReloadSwiss RS 60 | <<locked>> | 80% | 50,865 psi | 82% | 2572 fps | 100% |
| ReloadSwiss RS 62 | <<locked>> | 80% | 43,395 psi | 70% | 2444 fps | 100% |
| ReloadSwiss RS 70 | <<locked>> | 80% | 41,713 psi | 67% | 2461 fps | 99.9% |
| ReloadSwiss RS 76 | <<locked>> | 86% | 31,154 psi | 50% | 2290 fps | 95.4% |
| ReloadSwiss RS 80 | <<locked>> | 98% | 42,409 psi | 68% | 2539 fps | 95.5% |
| Rottweil R 903 | <<locked>> | 80% | 50,604 psi | 81% | 2477 fps | 100% |
| Rottweil R 904 | <<locked>> | 80% | 37,884 psi | 61% | 2293 fps | 95.1% |
| Rottweil R 905 | <<locked>> | 80% | 35,737 psi | 57% | 2293 fps | 95.9% |
| Rottweil R 907 | <<locked>> | 80% | 46,717 psi | 75% | 2428 fps | 99.2% |
| Shooters World Long Rifle | <<locked>> | 80% | 45,600 psi | 73% | 2405 fps | 99.8% |
| Shooters World SW4350 | <<locked>> | 80% | 43,888 psi | 70% | 2398 fps | 99.2% |
| SNPE Vectan SP 11 | <<locked>> | 80% | 51,735 psi | 83% | 2530 fps | 100% |
| SNPE Vectan Tubal 5000 | <<locked>> | 80% | 51,039 psi | 82% | 2369 fps | 100% |
| SNPE Vectan Tubal 7000 | <<locked>> | 80% | 44,512 psi | 71% | 2356 fps | 99.2% |
| SNPE Vectan Tubal 8000 | <<locked>> | 80% | 35,433 psi | 57% | 2290 fps | 95.8% |
| Somchem S355 | <<locked>> | 80% | 50,531 psi | 81% | 2474 fps | 100% |
| Somchem S361 | <<locked>> | 82% | 41,104 psi | 66% | 2336 fps | 95.3% |
| Somchem S365 | <<locked>> | 80% | 39,711 psi | 64% | 2375 fps | 100% |
| Somchem S385 | <<locked>> | 80% | 36,289 psi | 58% | 2283 fps | 97% |
| Vihtavuori N150 | <<locked>> | 80% | 48,283 psi | 77% | 2405 fps | 100% |
| Vihtavuori N160 | <<locked>> | 80% | 44,309 psi | 71% | 2408 fps | 100% |
| Vihtavuori N165 | <<locked>> | 82% | 33,518 psi | 54% | 2218 fps | 95.6% |
| Vihtavuori N550 | <<locked>> | 80% | 43,598 psi | 70% | 2411 fps | 100% |
| Vihtavuori N555 | <<locked>> | 80% | 34,853 psi | 56% | 2293 fps | 99.6% |
| Vihtavuori N560 | 62.8 gr | 86% | 41,597 psi | 67% | 2470 fps | 95.8% |
| Vihtavuori N565 | <<locked>> | 90% | 38,595 psi | 62% | 2402 fps | 95.1% |
| Vihtavuori N568 | <<locked>> | 98% | 44,048 psi | 71% | 2552 fps | 95.4% |
| Winchester 6.5 StaBALL | <<locked>> | 80% | 43,250 psi | 69% | 2375 fps | 100% |
| Winchester 760 | <<locked>> | 80% | 45,324 psi | 73% | 2470 fps | 99.4% |
| Winchester StaBALL HD | <<locked>> | 80% | 27,528 psi | 44% | 2238 fps | 99.7% |
| Winchester Supreme 780 | <<locked>> | 82% | 35,331 psi | 57% | 2264 fps | 95.6% |
Recommended = one of the top powders for this cartridge and bullet combination.
ᴾ possible press load - work up slowly to this load while watching for signs of excessive pressure.
This overview compares 82 powders for .300 Win. Mag. loaded with the .308 | 220gr | Rhino Solid Shank. Alliant Reloder-26 delivers the highest muzzle velocity at 2,730 fps; across all powders the maximum-charge window runs from 1,588 fps to 2,730 fps. ADI AR 2217 gives the best case fill at 100 %, and 82 of the 82 powders fall inside the usable 80–100 % fill window.
Relative to the caliber's maximum pressure (430 MPa), the top charges use 58–90 %, leaving at least 10 % headroom. The 220.0 gr projectile in 0.308" calls for a 1:12.0 twist; slower twists will usually not stabilise this weight. ADI AR 2217, ADI AR 2225, Alliant Reloder-25 reach 100 % fill or more at maximum charge, so these are compressed loads: they need a long drop tube to seat cleanly and react sensitively to the case capacity of your own brass lot. Vihtavuori N560, Accurate MAGPRO, Alliant Reloder-26 rank at the top here: for .300 Win. Mag. with the .308 | 220gr | Rhino Solid Shank they combine a high case fill with complete burn and sit in the upper velocity band. As outliers, Alliant Reloder-33, IMR 7977 Enduron, Vihtavuori N170 burn incompletely and react more sensitively to barrel length and temperature. Always begin at the start load and work up in small increments while checking case and primer for pressure signs.